Beer Calculus is a freely available homebrewing recipe generator, which allows you to easily create, save and share your own beer recipe(s). The calculator includes hundreds of malt, hop and yeast varieties, adjuncts and other ingredients, different mash processes, and fermentation and storage variables, and can toggle between US and metric units. Also, if you associate your recipe with a BJCP-recognized style, the calculator will give you guidance regarding your recipe's adherence to the style's guidelines. Homebrewers, have at it!
posted by cog_nate on Dec 4, 2009 - 22 comments

Calculate the value of your identity on the black market, based on how you access your financial information, your involvement in social and file-sharing networks, and security software installed. Spoiler: it's less than you imagine, as using the data is riskier than stealing the data, and the thieves market is polluted by liars (you can read more in the 12 page Microsoft research PDF). [more inside]
posted by filthy light thief on Sep 10, 2009 - 34 comments

Scientific calculator. Graphing calculator. Fraction calculator. Unit conversion calculators. Inflation calculator. Fuel cost calculator. WPM calculator. Homework assignment timeline calculator. Stock valuation calculator. Distance calculator. Meteor impact calculator. Currency calculator. BMI calculator. BPM calculator. [more inside]
posted by starman on Jul 25, 2009 - 36 comments

Where are you in the movie? If we started a movie on the day you were born, and stretched it over your lifespan, this is where you’d be in that movie.
posted by 40 Watt on May 4, 2009 - 83 comments

Pocket Calculator Show. via: Beware of Blog
posted by serazin on Jul 7, 2008 - 13 comments

I first learned about them when they featured prominently in a Gibson book (Pattern Recognition). When I looked on eBay, I was stunned at the prices they fetch. Now I can at least play with a virtual Curta mechanical calculator.
posted by Dave Faris on May 22, 2008 - 35 comments

Real nerds use HP calculators with RPN (Reverse Polish Notation) [more inside]
posted by Rafaelloello on Apr 25, 2008 - 75 comments

Poker hand simulator. Get a feel for the odds before you bet the farm.
posted by Brian B. on Feb 16, 2008 - 30 comments

JGuitar, a rather useful tool for those learning the guitar or experimenting with alternate tunings. You can even bookmark a certain tuning.
posted by signal on Apr 18, 2007 - 6 comments

Should you buy a house, or rent? (caution, flash & NYT) The answer is, of course, it depends. One of the biggest factors is how well the housing market will do after you buy. [previously: 1, 2] [via]
posted by rubin on Apr 11, 2007 - 104 comments

AJAX graphing calculator with a google-earth style interface.
posted by delmoi on Jun 23, 2006 - 25 comments

Death By Caffeine I just learned that it would take 155.11 cans of Mountain Dew to kill me, according to this odd little service.
posted by jragon on Aug 17, 2005 - 44 comments

Calculator Haiku
posted by Speck on Jul 23, 2005 - 9 comments

"Time: elusive and immediate...limited yet infinite. Because time is important to you, Hewlett-Packard introduces the HP-01, a new dimension in time management and personal computation." Truly, such an important model number could only be bestowed upon the king of all early calculator watches. No less than three batteries were required (two for the LED display alone), and even HP's impressive engineering was unable to save the HP-01 from the curse of bulkiness; it did not sell well at the $650 price point. The HP-01 was discontinued in 1980, as inexpensive LCD calculator watches began flooding the market (don't lie, you know you had one).
posted by Galvatron on Mar 27, 2005 - 17 comments

The Graphing Calculator Story. Amazing and very amusing article about the conception of a piece of software included with every Macintosh. Made at Apple... by volunteers.
Q: Do you work here? A: No.
Q: You mean you're a contractor? A: Actually, no..
Q: But then who's paying you? A: No one..
Q: How do you live? A: I live simply..
Q: (Incredulously) What are you doing here?!
posted by kika on Dec 22, 2004 - 34 comments

How long til you buy the farm? • "The Living to 100 Life Expectancy Calculator© was designed to translate what we have learned from studies of centenarians and other longevity research into a practical and empowering tool for individuals to estimate their longevity potential." Wasn't this on a Futurama episode?
posted by dhoyt on Sep 8, 2004 - 29 comments

Coincidence or contortion? Ivan Panin deciphered a numeric code in the Bible. Known as Gematria, the 'code' implies the Bible could not have been written without Holy assistance. Panin offered an open challenge for someone to create text using a similar pattern, yet no one was able to create one(nor tried).

However many people doubt the authenticity of the code though. The code is found in the same verses using different translations. It is also claimed that Panin manufactured his own translations to create this mathematical phenomenon.

Whether or not you believe, you can determine how good or evil any text or website is.
posted by JakeEXTREME on Jun 25, 2004 - 30 comments

How much is your personal information worth?
personal data toolkit [ via newstoday ]
posted by specialk420 on Feb 5, 2004 - 13 comments

Look, up in the sky, it's a search engine, it's a phone book, it's....a calculator? Start/Programs/Accessories/awww screw it, I've got Google. Found this by searching for my phone number (with the parens in the wrong place) because a magazine article told my girlfriend to. By the way, my phone number is -7 662.
posted by m@ on Aug 12, 2003 - 54 comments

The Soulmate Calculator tells you how many men or women you'll have to meet to find your soulmate, based on U.S. census figures and some weird theories. That's a lot of frogs to kiss...(via Salon)
posted by serafinapekkala on May 14, 2003 - 39 comments

Anita Mk VII the "A New Inspiration To Accounting" OR "A New Inspiration To Arithmetic" was the world's first electronic desktop calculator. Launched in 1961, the Mk VII and Mk VIII were the only commercial calculators available for a period of two years.
posted by riffola on Apr 21, 2003 - 9 comments

Alternate realities - as we approach a new year, you may want to measure some things differently - your age or your weight, for example. Some calculations may be flattering, others rather alarming. Even "wasting time" apparently can have some value. No matter what your age, there are some calculators that will help ensure longevity.
posted by madamjujujive on Dec 29, 2002 - 13 comments

Budget Orgy Calculator - tis the season for festivities, but all those galas can be a bit hard on the wallet. This handy party planner helps you to calculate your costs in advance and keeps you from forgetting important details.
posted by madamjujujive on Dec 9, 2002 - 8 comments

The Cost-of-Living Calculator.
posted by swift on Aug 14, 2002 - 18 comments

EasyRGB.com, a site I've recently stumbled across (or forgotten who sent me there) includes a color harmonies calculator that I find very intriguing. While it doesn't always produce great results, I find the idea and the execution pretty well nigh excellent; I just wish I could figure out how it does its calculations. They also attempt to match RGB colors to real-world color systems and paint chips, so if you've just got to make your bedroom match your website you'll be relieved to know that Dutch Boy sells a "3-B-5 Hang Ten" that is devilishly close to #006699.
posted by jplummer on Nov 23, 2001 - 8 comments

How to bypass web content filtering programs. It's easy, it works, and all you have to have is a Hex calculator. Strike a blow for freedom!
posted by Steven Den Beste on Jan 20, 2001 - 16 comments

Find the distance between two American telephone exchanges with the Interoffice Mileage Calculator. Find the distance between any two cities in the world with How Far Is It?. The latter also has a full database of American and Canadian towns, so I know that my hometown is 4864 miles from Athens, Greece, and 768 miles from Athens, Georgia.
posted by tdecius on Oct 11, 1999 - 0 comments